Can Preoperative Laboratory Values Predict Short-term Postoperative Complications and Health Utilization in Patients Undergoing Cranioplasty?

BACKGROUND

Low hematocrit, low albumin, and high creatinine levels have been associated with postoperative morbidity. The present study intends to analyze the effects of preoperative laboratories on medical complications and postoperative health resource utilization in patients undergoing cranioplasty.

METHODS

Using data from the American College of Surgeons National Surgical Quality Improvement Program, demographic, clinical, and intraoperative characteristics were collected for each patient who had recorded albumin, hematocrit, or creatinine laboratory values within 90 days of the index cranioplasty. Outcomes analyzed were ≥1 medical complication, ≥1 wound complication, unplanned reoperation, 30-day readmission, and extended hospital stay (>30 d). Outcomes significant on bivariate analyses were evaluated using multivariate logistic regression. Significant outcomes on multivariate analyses were analyzed using receiver operating characteristic curves and Mann-Whitney U tests.

RESULTS

The 3 separate cohorts included 1349 patients with albumin, 2201 patients with hematocrit, and 2182 patients with creatinine levels. Upon multivariate analysis, increases in albumin and hematocrit were independently associated with decreased odds of medical complications and extended length of stay. Increases in creatinine were independently associated with increased odds of medical complications. Discriminative cutoff values were identified for albumin and hematocrit.

CONCLUSIONS

Preoperative laboratory values were independent predictors of medical complications and health utilization following cranioplasty in this study. Surgical teams can use these findings to optimize preoperative risk stratification.

Clinical Practice Patterns in Abdominoplasty: 16-Year Analysis of Continuous Certification Data from the American Board of Plastic Surgery

BACKGROUND

The authors evaluated trends in practice patterns for abdominoplasty based on a 16-year review of tracer data collected by the American Board of Plastic Surgery as part of the continuous certification process.

METHODS

To facilitate comparison of an equal number of patients over time, tracer data from 2005 to 2021 were split into an early cohort (EC) (from 2005 to 2014) and a recent cohort (RC) (from 2015 to 2021). Fisher exact tests and two-sample t tests were used to compare patient demographics, surgical techniques, and complication rates.

RESULTS

Data from 8990 abdominoplasties (EC, n = 4740; RC, n = 4250) were analyzed. RC abdominoplasties report a lower rate of complications (RC, 19%; EC, 22%; P < 0.001) and a lower rate of revision surgery (RC 8%; EC, 10%; P < 0.001). This has occurred despite the increased use of abdominal flap liposuction (RC, 25%; EC, 18%; P < 0.001). There has been a decline in the use of wide undermining (81% versus 75%; P < 0.001), vertical plication of the abdomen (89% versus 86%; P < 0.001), and surgical drains (93% versus 89%; P < 0.001). Abdominoplasty surgery is increasingly performed in an outpatient setting, with increased use of chemoprophylaxis for thrombosis prevention.

CONCLUSIONS

Analysis of these American Board of Plastic Surgery tracer data highlights important trends in clinical practice over the past 16 years. Abdominoplasty continues to be a safe and effective procedure with similar complication and revision rates over the 16-year period.

Practice Profile of Practicing Plastic Surgeons: A 20-year Review of Plastic Surgery Statistics

Background

Evaluation of practice patterns by American Board of Plastic Surgery (ABPS) diplomates allows for a greater understanding as to how the field is progressing. Understanding evolving procedural trends can give insight into plastic surgeons' subspecialty focus and influence resident training to prepare them for future practice.

Methods

American Society of Plastic Surgeons member only projections for aesthetic and reconstructive procedures were reviewed from 1999 to 2018 in 5-year increments to identify shifts in frequency between the beginning (1999-2003) and end (2014-2018) of the timeframe. Tracer utilization for all four ABPS modules were also examined between 2014 and 2018. Descriptive statistics were performed to identify significant changes (P < 0.05) in subspecialty focus and procedure trends.

Results

Annual procedure incidence between 2014 and 2018 was compared with that between 1999 and 2003. The annual number of procedures more than doubled from 3,244,084 to 6,628,082. Among reconstructive procedures, there was a statistically significant increase in the number of breast reconstruction, breast implant removal, and maxillofacial surgery procedures, and a statistically significant decrease in the number of procedures focused on reconstruction of birth defects, burn injuries, and hand anomalies. In aesthetic surgery, significant increases were seen in the number of augmentation mammoplasty, abdominoplasty, and mastopexy procedures, with significant decreases in the number of blepharoplasty and rhinoplasty procedures.

Conclusions

Understanding the changing practice patterns of ABPS diplomates is essential to define the direction that our specialty is taking over time, and to guide program directors in plastic surgery on areas of focus for appropriate training of plastic surgeons.

Prospective Clinical Trial Evaluating the Outcomes Associated with the Use of Fresh Frozen Allograft Cartilage in Rhinoplasty

Background

There are different types of grafts for rhinoplasty, each with certain advantages and disadvantages. Fresh frozen cadaveric costal allograft (CCA) provides an alternative to rhinoplasties. The aim of this study was to compare the outcomes of fresh frozen CCA and traditional autologous costal cartilage in cosmetic and reconstructive rhinoplasty procedures.

Methods

This is a prospective, single-center, nonrandomized, open-label clinical trial. Objective assessment to evaluate warping, resorption, and displacement of the cartilage was achieved by measuring the differences of standardized values (deviation angle, nasofrontal angle, total facial convexity, nasofacial angle, and nasolabial angle) obtained at 6-months and 12-months postoperative follow-up on standard two-dimensional photographs (Δ = ∣measurement6 - measurement12∣). Subjective assessment was measured by the FACE-Q assessment.

Results

Fifty eligible patients between March 2017 and October 2020 were included. The average age was 43.9 ± 16.6 years and the mean follow-up period was 14.8 months. In the control group, the changes (Δ) in the deviation angle and nasolabial angle were greater than in the CCA group (P < 0.05). In the CCA group, the mean score of satisfaction with nose improved at 6 months and 1 year postoperatively (P < 0.05). The mean score of satisfaction with nostrils and overall facial appearance also increased in the CCA group at 6 months postoperatively (P < 0.05). Six patients from the CCA group and 10 patients from the control group experienced postoperative complications.

Conclusions

Fresh frozen CCA is a safe and reliable source of rhinoplasty grafts. It is aseptic, readily available, and free of donor site complications.

Content Validity of a Novel Scar Assessment Tool Evaluating the Career and Sexual Well-being Impact of Scars

Currently, patient reported outcome scales used to assess scar impact focus solely on psychosocial well-being, symptoms, and appearance. There remains a need to develop a broadened measure of scar impact on patients, focusing on sexual and career aspects. This study investigates the content validity of the novel Career and Sexual Well-being (CS) Scar Impact Scale.

Method

The CS scale contains five questions and was developed from previous patient thematic analysis interviews describing scar impact, and covers self-conscious behavior, new partners, hiding of the scar, being hindered in the workplace, and concerns regarding unprofessional appearance. Cognitive interviews and established guidelines were used to ensure that the scale was comprehensive, reproducible, and easily understandable.

Results

In total, 86 patients completed cognitive interviews. Patients had a clear understanding of the questions and elicited their intent in the interviews. An estimated 86% of patients rated the CS scale coverage of scar impact on career and sexual health at a three or above out of four; 95% said the specific instructions were clear, and 92% stated it took them less than 4 minutes to complete the scale. After the first round of interviews, a question about "perception/self-consciousness in a professional environment" was added based on patient suggestions.

Conclusions

The CS scar scale demonstrated face validity, acceptability, and field-readiness through cognitive interviewing of patients at our institution. Sexual well-being and career performance are important yet often neglected themes with which scars should be assessed. Usage of these tools would serve to improve current scar scales.

The Utilization of Fresh Frozen Cartilage in Asian Rhinoplasty: A New Approach

Asian rhinoplasty generally requires augmentation procedures rather than reduction. Alloplastic grafts are fraught with higher complication rates. Autologous cartilage grafts are safer. However, Asian patients typically do not have adequate septal cartilages, and other autologous cartilage grafts may cause surgical site morbidities, prolonged surgical time, and complications, including warping and infection. Asian rhinoplasties were performed using fresh frozen cartilage by the senior author. Patients' demographics and medical histories were recorded. Anthropometric measurements (nasofrontal angle, nasofacial angle, nasolabial angle, and Goode ratio) were taken on two-dimensional photographs. FACE-Q scales were used to assess patient-reported outcomes. Five Asian patients underwent rhinoplasty using the fresh frozen cartilage and were followed up for an average period of 14.2 ± 3.35 months. There was no resorption, warping, or infection. Anthropometric measurements showed no significant changes 2-4 months or 8-20 months after surgery. At the time of the 1-year follow-up, mean FACE-Q Satisfaction with Nose, and Satisfaction with Nostrils scores improved from 35.2 ± 10.06 to 60 ± 15.48 (P = 0.0002), and 42.6 ± 20.31 to 59.8 ± 38.21 (P = 0.12), respectively. Fresh frozen cadaveric cartilage is a novel option for Asian rhinoplasty. Our study demonstrated its safety and satisfying surgical outcomes.

Global Cleft Lip and Palate Outreach: A Google Trends Analysis

Understanding patient awareness of cleft lip and/or palate (CL/P) and evaluating demand for necessary procedures may serve to better target future efforts in global outreach.

We utilized internet search query data from Google Trends for the terms: "cleft lip," "cleft palate," "cleft lip and palate," "cleft surgery," and "cleft repair" from January 2004 to January 2021. Relative search volumes (RSV) recorded for the top 5 highest displaying countries and top 3 available regions within those countries were compared against global outreach by Operation Smile and Smile Train, as measured by the number of patients treated. World Health Organization (WHO) indicators were used to validate the RSV values for each country and better understand the current infrastructure and need for cleft care in those countries.

Globally, there was an increase in RSV for the terms "cleft lip," "cleft palate," "cleft repair," and "cleft surgery" between 2004 and 2021. For "cleft lip," the countries with the highest displaying RSVs included: Ghana (100%), Zimbabwe (97%), Nepal (78%), the Philippines (64%), and Kenya (52%). Countries with high RSVs and moderate to high WHO indicators included Ghana, Kenya, India, Nigeria, and Zimbabwe. Countries with high RSVs and poor WHO indicators included Nepal and Pakistan. Some countries had specific regions with high search demand that are not currently targeted for global outreach.

Using Google Trends' data may help find more feasible locations and targeted care for efforts in global outreach with better patient awareness and turnout where demand for CL/P is increasing.

Evaluation of Global Cleft Care Initiatives Among the Top Searched Low- and Middle-Income Countries

OBJECTIVE

International outreach for cleft lip and/or palate care has traditionally been characterized by foreign groups and individuals holding surgical outreach trips in low- and middle-income countries. However, this "magic bullet" approach has often been criticized for prioritizing short-term results that may disrupt local workflow. The presence and impact of local organizations that support cleft care and take on capacity building initiatives has not been well explored.

DESIGN

Eight countries previously studied as having the highest Google search demand for CL/P were chosen for the scope of the study. Local NGOs in regions were identified through a web search, and information was collected regarding the location, objectives, partnerships, and work conducted thus far.

RESULTS

Countries with a strong combination of local and international organizations included Ghana, Philippines, Nepal, Kenya, Pakistan, India, and Nigeria. The country with minimal to no local NGO presence included Zimbabwe. Local NGOs often supported education and research, training of providers and staff, spreading community awareness, offering interdisciplinary care, and opening cleft clinics and hospitals. Unique initiatives included starting the first school for children with CL/P, enrolling patients in the national healthcare to cover CL/P care, and monitoring the referral system to improve efficiencies in the healthcare system.

CONCLUSIONS

Moving towards a mindset of capacity building not only involves bilateral partnerships between international host sites and visiting organizations, but also collaboration with local NGOs that have a deep understanding of local communities. Successful partnerships may help address the complex challenges regarding CL/P care faced by LMICs.

The financial implications of telemedicine practice patterns across pediatric surgical specialties

BACKGROUND

Telemedicine has played an increasingly important role in surgical care during the coronavirus disease 2019 (COVID-19) pandemic, yet little is known about its usage and correlation to cost both within and across surgical specialties during the pandemic.

STUDY DESIGN

We collected data on telehealth encounters from April 2020 to June 2021 for all surgical specialties at a pediatric academic institution. The percent of total encounters that were telemedicine vs. in-person were analyzed over time. Data on charge and reimbursement were averaged for each encounter type, and the percent difference in average charge and reimbursement was calculated and compared between surgical specialties.

RESULTS

Of the 147,007 surgical clinical visits identified, 6,566 encounters (4.5%) were telemedicine. Usage peaked in April and plateaued in June of 2020. The specialties with the highest total percentages of telemedicine visits were neurosurgery (23.2%) and cardiovascular-thoracic (11.9%). Orthopedics reported the lowest usage at 2%. Charges for in-person encounters were higher for nearly all specialties while reimbursements remained equal.

CONCLUSION

Our institutional trends reveal that conversion to telemedicine varied across surgical specialty during the COVID-19 pandemic. Charges for in-person encounters were higher than telehealth ones for nearly all specialties, but the reimbursements were fairly the same. Understanding trends in telemedicine volume instigated by and following the pandemic may better prepare pediatric institutions to navigate the accelerated adoption and influence policy changes. This is particularly relevant given the fluctuating impact of the pandemic on healthcare institutions as new strains of COVID-19 emerge.

EVIDENCE LEVEL

Level V.

Utilizing Google trends to monitor coronavirus vaccine interest and hesitancies

Introduction

Vaccine hesitancy remains a serious challenge for ending the coronavirus disease 2019 (COVID-19) pandemic. Digital media has played an immense role in the spread of information during the pandemic. One method to gauge public interest in COVID-19 related information is to examine patterns of online search queries.

Methods

Google Trends (GT) was used to analyze results for search terms relating to COVID-19 vaccine misinformation, information, and accessibility from October 1st, 2020 to May 27th, 2021. GT allows you to compare multiple queries at one time. The resultant relative search volumes (RSVs) range from 0 to 100. The search term and point in time on the graph that has the greatest search volume is given a score of 100 and all other terms and times are given values relative to that maximum. Search interest peaks were analyzed by subgroups (misinformation, information seeking, and access seeking) and across key time points throughout the pandemic.

Results

GT analysis revealed that search interest related to vaccine misinformation, general information, and access seeking changed in relation to events taking place throughout the pandemic. The most commonly searched terms in each subgroup were: “Covid vaccine infertility”, “Covid vaccine side effects”, and “Covid vaccine appointment”. Searches related to misinformation peaked in December 2020. Search terms in the general information category peaked in April 2021. RSVs for access seeking terms peaked in March 2021 and have decreased since April 2021.

Conclusion

Misinformation RSVs were highest after FDA authorization and have multiple repeated spikes after subsequent vaccine announcements. General information seeking terms peaked concurrently with increased vaccination uptake in the United States. Search interest has decreased with wider vaccine availability, despite many individuals in the United States remaining unvaccinated. GT can be used to monitor trends in public attitudes and misinformation regarding COVID-19 vaccines and further target education.

68Ga-DOTATATE Uptake in COVID-19 Pneumonia: A Non-Neoplastic False Positive

In the detection and characterization of neuroendocrine tumors (NETs), the NETSPOT ⁶⁸ Ga-DOTATATE positron emission tomography/computed tomography (PET/CT) utilizes a somatostatin analog to capture whole body imaging of somatostatin receptors. Here, we report a rare case of incidental coronavirus disease 2019 (COVID-19) detection using ⁶⁸ Ga-DOTATATE PET/CT for a 48-year-old patient with COVID-19 who presented to our nuclear medicine department for oncologic and neuroendocrine indications. Current maximal intensity project image from 68Ga-DOTATATE PET/CT demonstrated numerous hypermetabolic foci in the upper abdominal lymph nodes, consistent with somatostatin-avid pancreatic islet cell neoplasm. Radiotracer uptake corresponding to the anatomic infiltrates was also seen in the bilateral pneumonia. With the rise of worldwide COVID-19 cases, and the continued use of NETSPOT for somatostatin avid neoplasms, it is imperative that diagnostic measures of this disease are clearly understood. This case highlights the importance of including COVID-19 on the differential diagnosis when radiotracer uptake appears in ⁶⁸ Ga-DOTATATE PET/CT.

Evaluation of Altrazeal transforming powder dressing on stage 2-4 pressure ulcers: a clinical case series

OBJECTIVE

Pressure ulcers (PUs) are hard-to-heal, open wounds that affect millions of adults worldwide. Patients experience physical, mental, social and financial impairment. On average, <50% of stage 3 and 4 PUs heal by the sixth month. Treatment of PUs is highly variable due to a patient's comorbidities, demographics and wound characteristics. Because of this, there exists no standard dressing for PUs. Altrazeal transforming powder dressing (TPD, Uluru Inc., US) offers a promising new form of wound treatment; however, little evidence exists for TPD in the treatment of hard-to-heal PUs. This case series sought to examine the effect of TPD in hard-to-heal PUs that have previously undergone unsuccessful standard of care (SoC) wound therapy.

METHODS

This case series used retrospective data from patients with stage 2-4 PUs that failed to heal after SoC therapies. Factors examined were: number of dressing changes; time between dressing changes; time to wound closure; and pain level. While data were assessed for all patients, we focused on the six particular cases that most clearly illustrated the effect of TPD on wound healing.

RESULTS

Each of the 21 patients treated with TPD experienced successful and expedited wound closure. Stage 4 PUs took an average of 87 days with approximately six dressing changes to closure. Stage 3 PUs took an average of 41 days with approximately four dressing changes, and stage 2 PUs an average of 13 days to closure with approximately one dressing change. In the cases presented herein for which pain scores were reported, each showed a reduction in pain from an 8 or 9/10 to a 1 or 2/10 with the first dressing change.

CONCLUSION

In this case series, TPD effectively reduced pain and healed PUs that had previously failed SoC interventions. We suggest future prospective studies in order to more effectively measure the wound healing capability and healthcare utilisation of TPD for treatment of PUs.

30-Day outcomes analysis of surgical management of radial head fractures comparing radial head arthroplasty to open reduction internal fixation

INTRODUCTION

Radial head arthroplasty and open reduction internal fixation are two commonly utilized treatment options for radial head fractures. The purpose of this study is to assess the incidence of and risk factors for short-term complications following radial head arthroplasty and open reduction internal fixation of radial head fractures.

METHODS

The American College of Surgeons National Surgical Quality Improvement Program was queried to identify patients that underwent radial head arthroplasty or open reduction internal fixation for radial head fractures between January 1st, 2015 and December 31st, 2017. The incidence of various 30-day complications, including unplanned readmission, reoperation, non-home discharge, mortality, surgical/medical complications, and extended length-of-stay were compared between the two propensity matched groups. Multivariate logistic regression was used to identify independent risk factors for various short-term complications.

RESULTS

After propensity matching, a total of 435 patients were included in our analysis. 250 patients underwent radial head arthroplasty, and 185 patients underwent open reduction internal fixation. Arthroplasty treated patients had a significantly longer mean total operative time (p = .031) and length-of-stay (p = .003). No significant 30-day complications differences were found for unplanned readmission, reoperation, non-home discharge, mortality, surgical complications or medical complications. Independent risk factors for any complications of both procedures included a history of chronic obstructive pulmonary disease and American Society of Anesthesiologists class III. Significant risk factors for length-of-stay greater than two days included a history of bleeding disorder and American Society of Anesthesiologists class III.

CONCLUSION

Our study revealed there were no significant differences in 30-day perioperative surgical or medical complications from either surgical treatment of radial head fractures; however, radial head arthroplasty treated patients were met with a significantly longer length-of-stay and longer duration of operating time. We also identified risk factors that were independently associated with higher rates of complications regardless of treatment type.

Hedgehog Inhibitor Induction with Addition of Concurrent Superficial Radiotherapy in Patients with Locally Advanced Basal Cell Carcinoma: A Case Series

BACKGROUND

Locally advanced basal cell cancer is a rare and challenging clinical problem. Historically, these patients were treated with aggressive surgery or radiotherapy. Most sporadic basal cell carcinomas have somatic mutations in the hedgehog pathway. Oral hedgehog inhibitors induce rapid and often complete clinical responses in locally advanced basal cell tumors. Unfortunately, these responses are usually transient. We hypothesized that treatment failure represents persistence of drug resistant cells that could be eradicated by addition of localized radiotherapy.

MATERIALS AND METHODS

We performed a retrospective review of our patients with locally advanced basal cell cancer treated with sonidegib or vismodegib induction therapy who were treated with added superficial radiotherapy at the time of maximal response.

RESULTS

Twelve patients met inclusion criteria. All patients achieved a complete response following hedgehog inhibitor therapy with addition of radiotherapy. Progression-free survival at 40 months was 89%, with a median follow-up of 40 months. Relapses occurred in only 2 of 12 patients (16.6%). Nine patients experienced grade I-II toxicity from hedgehog inhibitor induction therapy (taste changes [3], weight loss [3], muscle cramps [3]). Eight patients experienced mild radiotherapy-induced skin toxicity during concurrent therapy. No patients had to discontinue treatment.

CONCLUSION

Induction therapy with hedgehog inhibitors followed by addition of concurrent radiation therapy resulted in an extremely high clinical response rate with relatively minor and reversible toxicity. This gave a high rate of progression-free survival and a low disease-specific progression rate. Further prospective evaluation of this treatment approach is needed to confirm the apparent clinical activity.

IMPLICATIONS FOR PRACTICE

Locally advanced basal cell cancers are challenging to treat. Previously, aggressive surgical resection or radiotherapy represented the best treatment options. Most basal cell cancers have somatic mutations in the hedgehog pathway. Oral inhibitors of this pathway produce rapid but transient clinical responses. This study reports 12 patients treated with hedgehog inhibitor induction therapy to near-maximal response. Addition of concurrent involved field radiotherapy resulted in a very high complete response rate with minimal toxicity. There was prolonged progression-free survival in 90% of patients. This study identified a novel treatment approach for patients with advanced basal cell carcinoma.

The Current State of Cleft Care in Sub-Saharan Africa: A Narrative Review

OBJECTIVE

To identify practices and limitations of cleft care in sub-Saharan Africa (SSA).

DESIGN

A retrospective narrative nonsystematic literature review was performed.

SETTING

Literature exploring the management practices of cleft lip and/or palate across regions in SSA was included.

PARTICIPANTS

Full text case reports, retrospective studies, prospective studies, clinical trials, and review articles written and published in English between 1966 and February 1, 2021, were included in this analysis utilizing PubMed, MEDLINE, EMBASE, and Google scholar databases.

MAIN OUTCOME MEASURES

Qualitative themes identified in analysis were clinical practice patterns, current infrastructure and limitations of cleft repair, training and interdisciplinary teams, economic analyses, and international partnerships.

RESULTS

Significant barriers to care identified in SSA include lack of hospital resources, craniofacial training, access to multidisciplinary specialists, and public awareness. These problems make the entire care journey difficult for patients. Increasing public education has the power to diminish late presentations to hospitals. Providing adequate hospital resources and craniofacial training through international and organizational partnerships can ensure that more patients will receive care. Increasing the availability and number of multidisciplinary specialists is crucial to follow up care which aims at improving functional outcomes.

CONCLUSION

This narrative review highlights current practices and limitations in cleft care, emphasizing the importance of effective and timely repair of clefts in SSA. Targeted efforts aimed at establishing sustainable infrastructure for cleft care in SSA can have significant individual and community health and economic benefits.

Trends in Leadership Within Orthopedic Foot and Ankle Fellowships

Background:

No study in the orthopedic literature has analyzed the demographic characteristics or surgical training of foot and ankle fellowship directors (FDs). Our group sought to illustrate demographic trends among foot and ankle fellowship leaders.

Methods:

The American Orthopaedic Foot & Ankle Society (AOFAS) Fellowship Directory for the 2021 to 2022 program year was queried in order to identify all foot and ankle fellowship leaders at programs currently offering positions in the United States and Canada. Data points gathered included age, sex, race/ethnicity, location of surgical training, time since training completion until FD appointment, length in FD role, and individual research H-index.

Results:

We identified 68 fellowship leaders, which consisted of 48 FDs and 19 co-FDs. Sixty-five individuals (95.6%) were male, and 3 (4.4%) were female. As regards race/ethnicity, 88.2% of the leadership was Caucasian (n = 60), 7.4% was Asian American (n = 5), 1.5% was Hispanic/Latino (n = 1), and 1.5% was African American (n = 1). The average age was 51.5 years, and the calculated mean Scopus H-index was 15.28. The mean duration from fellowship training to fellowship leader position was 11.23 years.

Conclusion:

Leaders within foot and ankle orthopedic surgery are characterized by research prowess and experience, but demographic diversity is lacking.

Level of Evidence:

Level III.

Diabetic wound healing: The impact of diabetes on myofibroblast activity and its potential therapeutic treatments

Diabetes is a systemic disease in which the body cannot regulate the amount of sugar, namely glucose, in the blood. High glucose toxicity has been implicated in the dysfunction of diabetic wound healing, following insufficient production (Type 1) or inadequate usage (Type 2) of insulin. Chronic non-healing diabetic wounds are one of the major complications of both types of diabetes, which are serious concerns for public health and can impact the life quality of patients significantly. In general, diabetic wounds are characterized by deficient chemokine production, an unusual inflammatory response, lack of angiogenesis and epithelialization, and dysfunction of fibroblasts. Increasing scientific evidence from available experimental studies on animal and cell models strongly associates impaired wound healing in diabetes with dysregulated fibroblast differentiation to myofibroblasts, interrupted myofibroblast activity, and inadequate extracellular matrix production. Myofibroblasts play an important role in tissue repair by producing and organizing extracellular matrix and subsequently promoting wound contraction. Based on these studies, hyperglycaemic conditions can interfere with cytokine signalling pathways (such as growth factor-β pathway) affecting fibroblast differentiation, alter fibroblast apoptosis, dysregulate dermal lipolysis, and enhance hypoxia damage, thus leading to damaged microenvironment for myofibroblast formation, inappropriate extracellular matrix modulation, and weakened wound contraction. In this review, we will focus on the current available studies on the impact of diabetes on fibroblast differentiation and myofibroblast function, as well as potential treatments related to the affected pathways.

Human immunodeficiency virus infection and stroke in young patients

OBJECTIVE

To determine the association between human immunodeficiency virus (HIV) infection and stroke among young persons.

DESIGN

Retrospective case-control study.

SETTING

Large, inner-city public hospital.

PARTICIPANTS

All patients aged 19 to 44 years with a diagnosis of stroke, whose HIV status was determined, admitted from January 1990 through June 1994. Controls matched for age and sex were selected from patients who were admitted during the same period for status asthmaticus whose HIV status was known.

MAIN OUTCOME MEASURE

The associations of HIV infection with all strokes and with cerebral infarction, after adjustment for other cerebrovascular risk factors, were evaluated by Mantel-Haenszel stratified analyses. The subtypes and causes of stroke in HIV-infected patients were compared with HIV-seronegative patients.

RESULTS

The HIV infection was associated with stroke (odds ratio [OR], 2.3; 95% confidence interval [CI], 1.0-5.3) and cerebral infarction (OR, 3.4; 95% CI, 1.1-8.9), after adjustment for other cerebrovascular risk factors. Among patients with stroke, cerebral infarction was more frequent in HIV-infected patients than in HIV-seronegative patients (20 [80%] of 25 vs 48 [56%] of 88, P = .04). The frequency of cerebral infarctions associated with meningitis (P < .001) and protein S deficiency (P = .06) was higher in HIV-infected patients than in seronegative patients.

CONCLUSIONS

Our study suggests that HIV infection is associated with an increased risk of stroke, particularly cerebral infarction in young patients. This risk is probably mediated by increased susceptibility of HIV-infected patients to meningitis and protein S deficiency.